Items

• [D8020ZFA], Letter from John Kruesi to Charles T Porter, June 6th, 1880
  1880-06-06
• [D8020ZGI], Letter from Thomas Alva Edison to Charles T Porter, August 1880
  1880-08-00
• [D8213C], Letter from John Wheldon to Charles T Porter, March 6th, 1882
  1882-03-06
• [LB008281], Letter from Thomas Alva Edison to Southwark Foundry and Machine Co, Charles T Porter, May 28th, 1881
  1881-05-28
• [LB006218], Letter from Thomas Alva Edison to Charles T Porter, July 20th, 1880
  1880-07-20
• [LB006219], Letter from Charles Lorenzo Clarke to Charles T Porter, July 20th, 1880
  1880-07-20
• [LB006264], Letter from Thomas Alva Edison to Charles T Porter, August 6th, 1880
  1880-08-06
• [LB006557], Letter from Charles Lorenzo Clarke to Charles T Porter, November 17th, 1880
  1880-11-17
• [LB006559], Letter from Charles Lorenzo Clarke to Charles T Porter, November 18th, 1880
  1880-11-18
• [LB006566], Letter from Charles Lorenzo Clarke to Charles T Porter, November 19th, 1880
  1880-11-19
• [LB006595], Letter from Charles Lorenzo Clarke to Charles T Porter, November 26th, 1880
  1880-11-26
• [LB006663], Letter from Charles Lorenzo Clarke to Charles T Porter, December 14th, 1880
  1880-12-14
• [LB006767], Letter from Charles Lorenzo Clarke to Charles T Porter, January 6th, 1881
  1881-01-06
• [LB006780], Letter from Charles Lorenzo Clarke to Charles T Porter, January 10th, 1881
  1881-01-10
• [LB006788], Letter from Charles Lorenzo Clarke to Charles T Porter, January 12th, 1881
  1881-01-12
• [LB006847], Letter from Charles Lorenzo Clarke to Charles T Porter, January 25th, 1881
  1881-01-25
• [LB022323], Letter from Thomas Alva Edison to Charles T Porter, August 13th, 1886
  1886-08-13
• [LB030264], Letter from Alfred Ord Tate to Charles T Porter, June 7th, 1889
  1889-06-07
• [LB051374], Letter from Alfred Ord Tate to Charles T Porter, October 21st, 1891
  1891-10-21